* {
    margin: 0;
    padding: 0;
    color: rgba(51,51,51);
}
/* 浏览器兼容性写法 */
html {
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
}
a {
    text-decoration: none;
    color: white;
}
a:hover {
    color: red;
    cursor: pointer;
    background-color: transparent;
}
ul {
    list-style: none;
}
img {
    border-style: none;
}
body {
    margin: 0 auto;
    width: 1348px;
    height: 3655px;
}
.nav {
    position: relative;
    margin: 5px;
    padding: 7px 0;
    font-weight: 600;
}
.nav span {
    height: 100px;
}
.nav img {
    margin: 10px 5px 0 150px;
    display: inline;
}
.nav h2 {
    position: absolute;
    top: 15px;
    display: inline;
}
.nav span ul {
    position: absolute;
    display: inline;
    right: 100px;
    width: 700px;
    height: 50px;
}
.nav span ul li {
    display: inline;
    float: left;
    margin: 10px 20px;
 }
 .nav span ul li a {
     color: rgba(80,80,80);
 }
 .nav span ul li:hover a{
     color: red;
     cursor:pointer;
 }
 #wrap {
    overflow: hidden;
    position: relative;
    margin: 0 auto;
    width: 1348px;
    height: 580px;
}
#wrap .img-list {
    display: flex;
    position: relative;
    left: 0;
    width: 100%;
    height: 100%;
    transition: .5s ease;
}
#wrap .img-list img {
    width: 100%;
    cursor: pointer;
}
#wrap a {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: block;
    height: 70px;
    width: 40px;
    background-color: rgba(0,0,0,.7);
    color: white;
    font-size: 30px;
    user-select: none;
    text-align: center;
    line-height: 70px;
}
#wrap a.left {
    left: 0;
}
#wrap a.right {
    right: 0;
}
.circle-list {
    display: flex;
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%,0);
    width: 240px;
    height: 40px;
    z-index: 8;
}
 .circle-list >.circle {
     margin: 0 5px;
     width: 30px;
     height: 30px;
     background-color: #ecf0f1;
     border-radius: 50%;
 }
 .circle-list> .circle.active {
     background-color: #e74c3c;
 } 
 .circle-list .circle:hover {
     cursor: pointer;
 }
 .design {
     margin: 100px auto 30px;
     text-align: center;
     height: 60px;
     width: 900px;
     color: rgba(80,80,80);
     border: 2px solid rgba(255,255,255,0.3);
 }
 .line {
    display: inline-block;
    width: 350px;
    border-top: 1px solid rgba(80,80,80) ;
    vertical-align: 5%;
 }
.txt {
     display: inline-block;
     font-size: 16px;
     font-weight: 600;
     letter-spacing: 1px;
    color: rgba(80,80,80);
    vertical-align: middle;
 }
 .txt .words {
     font-size: 14px;
     font-weight: normal;
     letter-spacing: normal;
     color: rgba(80,80,80);
 }
 .photos {
     display: grid;
     margin:0 auto;
     width: 900px;
     grid-template-columns: repeat(4,1fr);
     gap:10px 10px;
     grid-auto-rows: minmax(200px,auto);
 }
 .photos #one {
     grid-column: 1/2;
     grid-row: 1/2;
     background: url(images/design1.png) no-repeat;
     border-radius: 10px;
 }
 .photos #two {
     grid-column: 2/3;
     grid-row: 1/2;
     background: url(images/design2.png) no-repeat;
     border-radius: 10px;
 }
 .photos #three {
     grid-column: 1/3;
     grid-row: 2/3;
     background: url(images/design4.png) no-repeat;
     border-radius: 10px;
 }
 .photos #four {
     grid-column: 3/5;
     grid-row: 1/3;
     background: url(images/design3.png) no-repeat;
     border-radius: 10px;
 }
 .photos .images:hover {
    transform: scale(1.1,1.1);
    cursor: pointer;
    transition: .5s ease;
    border: 1px solid rgba(255,255,255,0.8);
 }
.join {
    margin: 60px auto;
    height:300px;
    background: rgba(0,0,0,0.7) url(images/bgp2.png) no-repeat;
    background-size: 100% 100%;
    background-position: center;
    background-size: cover;
    background-blend-mode: darken;
}
.join .container {
    margin: 50px auto;
    padding-top: 50px;
    width: 700px;
    height: 250px;
    background: rgba(0,0,0,0.2);
}
.join .container p {
    margin: 20px auto;
    height: 50px;
    width: 500px;
    color: white;
    text-align: center;
    font-size: 34px;
    font-weight: 600;
    letter-spacing: 2px;
}
.join .container .part {
    margin:0 auto;
    margin-top: 20px;
    height: 50px;
    width: 200px;
    text-align: center;
    line-height: 50px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    background: rgba(255,255,255,0.2);
} 
.case {
    margin: 0 auto;
    width: 880px;
    height: 400px;  
}
.case .header {
    margin: 30px auto;
    width: 100%;
    height: 50px;
    text-align: center;
}
.case .cases ul li {
    float: left;
}
.case .cases ul li .info:nth-child(2n):hover {
    overflow: hidden;
    height: 160px;
    transform: translateY(-90px);
    color: #ccc;
    transition: .4s ease-in-out;
    background-color: rgba(0,0,0,0.3);
}
.case .cases ul li .info:nth-child(2n+1):hover {
    overflow: hidden;
    height: 100px;
    transition: .3s ease-in-out;
    color: white;
    background-color: rgba(0,0,0,0.6);
} 
.case .cases .info { 
    padding-top: 25px;
    height: 75px;
    width: 170px;
    text-align: center;
    font-size: 14px;
    color: #666;
}
.case .cases .info .triangle {
    margin: 5px auto 0;
    height: 0;
    width: 0;
    border:0;
    border: 6px solid transparent;
    border-top-color: gray;
}
.process {
    margin: 180px auto;
    margin-bottom: 20px;
    height: 300px;
}
.process .header {
    margin: 20px auto;
    padding: 40px 0 10px;
    width: 100%;
    height: 200px;
    text-align: center;
    background-color: rgba(239,239,239);
}
h4 {
    color: rgba(51,51,51);
    letter-spacing: 1px;
}
.process .header .member {
    margin: 50px auto;
    margin-bottom: 20px;
    color: #666;
    font-size: 14px;
}
.process .header .box {
    display: inline-block;
    margin: 0 8px;
    width: 150px;
    height: 30px;
line-height: 30px;
color: white;
font-size: 14px;
background-color: black;
}
.box1 {
    color: white;
}
.box1:hover {
    transform: translateX(3px);
    cursor: pointer;
    transition: .1s ease-in-out;
}
.process .header .box .arrow {
    height: 80px;
    width: 40px;
    line-height: 120px;
}
.introduction {
    margin: 30px auto;
    width: 880px;
    height: 500px;
}
.introduction header {
    text-align: center;
}
.introduction header .member {
    margin: 30px;
    margin-bottom: 40px;
    font-size: 12px;
    color: #ccc;
}
.introduction .wrapper {
display: grid;
margin: 20px auto;
width: 880px;
height: 200px;
grid-template-columns: repeat(2,1fr);
gap: 10px 20px;
grid-auto-rows: minmax(250px,auto);
}
.introduction .wrapper .one {
    position: relative;
    grid-column: 1/2;
    grid-row: 1/2;
}
 .flash-bar {
    position: absolute;
    left:-120px;
    width: 20px;
    height: 100%;
    background: #fff;
    opacity: 0.5;
    transform: skewX(-30deg);
    /* skewX() CSS函数是一个水平方向上的剪切映射 */
    transform-origin: 0 100%;
 }
 .one:hover .flash-bar {
   left: 450px;
   transition: left ease-in-out 1s;
   z-index: 1;
 }
.introduction .wrapper .two {
    position: relative;
    grid-column: 2/3;
    grid-row: 1/2;
    border-top: 5px solid rgba(243,245,245);
    z-index: 2;
}
.introduction .wrapper .two .para {
    padding: 0 5px;
    text-indent: 50px;
    line-height: 25px;
}
h3 {
    padding-top: 25px;
    text-indent: 2px;
    letter-spacing: 1px;
    font-weight: 600;
}
.introduction .wrapper .two .search {
    margin-top: 20px;
    width: 430px;
    height: 30px;
    background: rgba(243,245,245);
}
.introduction .wrapper .two .search input {
    background: rgba(243,245,245);
}

.introduction .wrapper .two .search .ask {
    float: left;
    height: 30px;
}
.introduction .wrapper .two .search .ask input {
    float: left;
    padding: 0 5px;
    height: 28px;
    outline: none;
    border: none;
}
.introduction .wrapper .two .search .more {
    float: right;
    width: 120px;
    height: 100%;
    line-height: 30px;
    text-align: center;
    color: white;
    background-color: black;
}
.footer
{   margin: 0 auto;
    height: 550px;
    text-align: center;
    background: rgba(0,0,0,0.7) url(images/footer123.png) no-repeat;
    background-size: cover;
}
.footer .p-first {
    padding-top: 100px;
}
h1 {
    color:white;
    font-weight: 500;
    letter-spacing: 1px;
}
.h3-about {
    margin-bottom: 80px;
    font-size: 16px;
    color: white;
    letter-spacing: normal;
}
/* 设置灰色框框 */
.footer .summary .restrict {
margin: 0 auto;
width: 900px;
height: 30px;
background-color: rgba(255,255,255,0.4);
}
.footer .summary .restrict ul {
    display: flex;
    margin: 0 auto;
    height: 30px;
    width: 660px;
}
.footer .summary .restrict ul li {
float: left;
margin:0 auto;
width: 100px;
height: 30px;
line-height: 30px;
justify-content: center;
letter-spacing: 1px;
color: white;
font-size: 15px;
letter-spacing: 2px;
}
.footer .detail {
    margin: 50px auto;
}
.footer .detail .p-detail {
color: white;
font-size: 14px;
line-height: 20px;
letter-spacing: 1px;
}



